Transposition bracket



C. H. KLEIN TRANSPOSITION BRACKET Filed May 25, 1931 5 22 F/Gl 23 27 Z6 \'L/\l UL---wv-'l HC/i I /'0 4 ""I [jmp I n (gil /NvE/v ro/P C. H. K EIN ,B22 @1cm Md A TTR/VE Y Patented June 6, 1933 UNITED STATES PATENT OFFICE CHARLES H. KLEIN, OF RUTHERCEORD, NEW JERSEY, ASSIGNOR- TO BELL TELEPHONE f LABORATORIES, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION 0F NEW YORK 'I RANSIPOSITION BRACKET y Application filed May 25, 1931. ySerial No. 539,971.

This invention relates to an improvement in transposition brackets for insulators and more particularly to a bracket for the transposition of open telephone or telegraph lines.

The object of the present invention is to provide a. simple and unitary means for the transposition of a plurality of wires at one pole in a plurality of directions.

A further object of my invention is the incorporating` in one unit, of a means for supporting the insulators to which the transmission wires are attached, which may be removed from the cross-arm without disturbing the wires then'iselves.

A further object of my invention is to pron vide a strong durable bracket which is cheap to manufacture and which may be installed With a minimum amount of labor.

In accordance with my invention the bracket consists of two parallel spaced apart irregular shaped members which are secured together at each end by means of a connect ing strap. The irregular shaped members are provided with apertures for securing the insulator mounting pins. The members which support the insulators are formed to provide a plurality of levels for the insulators, thereby preventing the crossing Wires trom coming in contact with each other.

Referring` to the drawing,

Fig. 1 is a plan view oi." the improved bracket;

Fig. 2 is a side View ot Fig. 1 with the wires secured to the insulators; and

Fig. 3 is a perspective view oi' the improved bracket shown secured to the crossarm of a supporting pole.

The preferred embodiment of the invention comprises a bracket which is particularly adapted for use with telephone or telegraph circuits which require the utmost care in their installation in order to reduce the inductive effects between the conductors. The bracket may be made of any suitable material, such as high carbon steel or the like.

These brackets in actual practice are installed at suitable intervals along the transmission line and are mounted on the crossarms as shown in Fig. 3.

In accordance with the preferred embodi l ment of the .invention there is provided, a pair of Vspaced apart parallel members 10 and 11, preferablyy formed out of angle iron or steel and having an irregular contour, secured together at their ends by means of a pair of stepped members 12 and 13. These members 12 and 18 are provided with apertures 14 and l5, for securing ythe bracket to the cross-arm 16, as shown in Fig. 3.

Located on the members 10 and 11 and in a definite spaced relation with respect to each other are the insulators 17, 18, 19, 20, 21, 22, 28 and 241. These insulators are mounted on the usual metallic insulator pins 25, the diagonally opposed insulators being :in the same plane with respect to each other, and all of the insulators on a given member are in diiierent planes.

By referring to Fig. 2 it can be seen that the insulator 18 is mounted on the highest portion of the member 11, while theinsulator 19 ismounted on the lowest portion, the insulator 17 being slightly higher -thanthe insulator 19 but not quite as high as insulator 18, and insulator 20 being slightly lower than insulatorL 18 but not quite as low as insulator 19. y

As shown in the drawing and in particular Fig. 2 the members 10 and 11 are identical in shape and are so mounted that the highest portion of one is directly opposite the lowest portion of the other, and vice versa. The

` insulator 17 on the member 11 is slightly higher than the corresponding insulator 21 onthe member 10, lower than insulator 23, but on the same plane with the diagonally opposed insulator 24. The insulator'lS is located on thehighest portion of member 11 and is considerably higher than the corresponding insulator 22 on member 10, which is mounted on the lowest portion thereof, but on the same plane with the diagonally opposed insulator 23 on member 10. Insulator 19 is mounted on the lowest portion of member 11 and is considerably lower than the corresponding insulator 23 on member 10, which is mounted on the highest portion thereof, but on the same plane with the diagonally opposed insulator 22 on member 10. Insulator 2O on member 11 is mounted slightly higher than insulator 19 and slightly lower than insulator 17 on member 11 and insulator 24 on member 10 but in the same plane With the diagonally opposed insulator 21.

Referring to Figs. 2 and Sgall diagonally opposed insulators are in the same plane with respect to each other but no two directly opposite insulators are in the same plane. This construction provides insulators in tour diii'crent planes. For example7 insulators 18 and 23 being in the highest plane, insulators 17 and 241 being slightly lower, insulators 2O and 21 still lower and insulators 19 and 22 still lower.

As shown in Fig. 3, this construction permits the transposing ot tivo pairs of Wires in tour diflerent Ways at one pole and none of the Wires 26, 2T, 28 or 29 coming in contact With each other.

Applicant has provided a transposition bracket which is now a complete unit in itself. It is secured to the cross-arm by means of two through bolts and in case of a cross-arm or pole replacement the bracket can remain in position suspended from the Wires.

that is claimed is:

1. A transposition bracket comprising spaced apart parallel members having high and low portions, insulators mounted on said members, and means secured to the ends of said members for maintaining them in a definite spaced relation.

2. A transposition bracket comprising spaced apart parallel members having high and low portions, insulators mounted on said members, means at the ends of said members for securing them together, each of said insulators being on the same level With the one diagonally opposite.

3. A transposition bracket comprising spaced apart parallel members having high and loW portions, insulators mounted on said members at different levels, and means at the ends of said members for securing them to gether.

4. A tansposition bracket comprising spaced apart parallel members having high and low portions thereon, insulators mounted on said portions, and stepped members at the end of said parallel members for securing them together.

5. A transposition bracket comprising a pair of spaced apart irregular shaped parallel members connected together at their ends, the opposite ends of each member being at a different level and the diagonally opposite ends being at substantially the same level.

In Witness whereof, I hereunto subscribe my name, this 22d day of May, 1931.

CHARLES H. KLEIN. 

